Explorations of the Universe with the BABAR and LSST Experiments

通过 BABAR 和 LSST 实验探索宇宙

• 批准号: 0652409
• 负责人: Patricia Burchat
• 金额: $ 123.27万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-07-01 至 2011-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0652409&HistoricalAwards=false
• 关键词: Explorations; Universe; BABAR; LSST; Experiments

The fields of particle physics and cosmology have become inextricably intertwined. Accelerator based experiments, detectors in mines, and telescopes are all needed and used to explore fundamental questions such as the nature of dark matter. The Stanford group led by Principle Investigator Patricia Burchat will complete its investment in the highly productive BaBar experiment at the Stanford Linear Accelerator Center and build a new effort in cosmology through the proposed Large Synoptic Survey Telescope. On the BaBar experiment the goal is to more than double the current data sample by the time the experiment completes its nine-year program at the end of FY2008. The Stanford group will contribute to the maintenance and operation of the SVT and the SVT radiation monitoring system. Members of the group will complete ongoing searches for new physics in rare or forbidden tau and charm decays, and a diverse set of analyses involving charmed baryons. The group is also initiating a new analysis effort involving D mixing and will conduct the final time-dependent Dalitz-plot analysis of B - rho pi on the complete data sample, to extract the CKM angle alpha. The Large Synoptic Survey Telescope is the first ground-based telescope being designed from scratch to address the severe demands on systematic uncertainties needed to fully exploit weak gravitational lensing as a cosmological probe. The LSST will also address cosmological questions through studies of the growth of large scale structure, baryon acoustic oscillations, and Type Ia supernovae. The Stanford group is joining the LSST project collaboration and will contribute to areas that benefit from the experience of particle physicists and aid in the understanding and reduction of potential systematic uncertainties: the development of a detailed simulation, the study of algorithms with existing data sets, and the design and construction of calibration systems. The broader impacts of the program have several foci. The PI will continue her efforts to integrate experimental particle physicists into the LSST project through tutorials and workshops. Members of the Stanford group have been very involved in programs that involve high school teachers and students (including those traditionally under-represented in physics) in basic research. The PI has led efforts to develop new undergraduate majors that increase the cohort of students who receive an education in physics.

粒子物理学和宇宙学领域已经变得密不可分。基于加速器的实验、矿井探测器和望远镜都需要并用于探索暗物质本质等基本问题。由首席研究员 Patricia Burchat 领导的斯坦福大学研究小组将完成对斯坦福线性加速器中心高产 BaBar 实验的投资，并通过拟议的大型综合巡天望远镜在宇宙学领域开展新的工作。 BaBar 实验的目标是在 2008 财年末实验完成其九年计划时将当前数据样本增加一倍以上。斯坦福大学小组将致力于 SVT 和 SVT 辐射监测系统的维护和运行。该小组的成员将完成对稀有或禁止的 tau 原子和粲衰变的新物理的持续探索，以及涉及粲重子的各种分析。该小组还启动了一项涉及 D 混合的新分析工作，并将对完整数据样本进行 B - rho pi 的最终时间相关 Dalitz 图分析，以提取 CKM 角度 alpha。 大型综合巡天望远镜是第一个从头开始设计的地面望远镜，旨在满足充分利用弱引力透镜作为宇宙学探测器所需的系统不确定性的严格要求。 LSST 还将通过研究大尺度结构的生长、重子声振荡和 Ia 型超新星来解决宇宙学问题。 斯坦福大学小组正在加入 LSST 项目合作，并将为受益于粒子物理学家经验的领域做出贡献，并帮助理解和减少潜在的系统不确定性：详细模拟的开发、利用现有数据集研究算法以及校准系统的设计和构建。 该计划的更广泛影响有几个重点。 PI 将继续努力通过教程和研讨会将实验粒子物理学家融入 LSST 项目。斯坦福大学小组的成员一直积极参与涉及高中教师和学生（包括传统上在物理学领域代表性不足的学生）基础研究的项目。 PI 领导了开发新的本科专业的工作，以增加接受物理学教育的学生群体。